rails                   
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have  to follow a set path. this path is 
 called  a "railway",  which is comprised 
 of two metal rails, hence  its nickname. 
                                          
 because  the  low  friction between  the 
 wheels of the train  and the rail metal, 
 there  are limits for  how acute a curve 
 can be,  and even more so  for  how much 
 the   ground  under  the  rails  can  be 
 sloped.  thus a railway is often not led 
 on top  of hills, rather through them in 
 tunnels   (if   they   are  large),   or 
            artificial chasms.            
                                          
 there  will be trees on the side  of the 
 rails, but not too  close, or they  will 
 be  cut  down by  the railway  janitors. 
 there will  be  plains,  and  bodies  of 
                  water.                  
                                          
 trains  go by day  and  by night.  along 
      the way, there is information       
 scattered, often put  on top  of  poles, 
 to be interpreted by the  train drivers. 
 different  parts  of  the  railway  have 
          different speed limits.         
                                          
 sometimes, trains have  to stop and wait 
 for something  to happen, far away. this 
 is  signaled  by  red  or green  lights. 
                                          
                                  
                                          
 many people  follow  the  rails by foot. 
 often  this  proves  to  be the  shorter 
 path  between  two  points. however this 
 is  frowned  upon,   and  very  impolite 
         toward the train drivers!